Aemistead m



(No Model.)

A. M. DARRELL. MARKING BRUSH.

No. 450,662. Patented Apr. 21, 1891.

WITNESSES. II\. M

UNrTnn STATES PATENT OFFICE.

ARMISTEAD M. DARRELL, OF IVASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OF ONE-HALF TO TEMPLE CLARK.

MARKING-BRUSH.

SPECIFICATION forming part of Letters Patent No. 450,662, dated April Application filed July 1, 1890. Serial No. 357,330- (No model.)

To all whom it 72m concern:

Be it known that I, ARMISTEAD M. DARRELL, a citizen of the United States, residing at \Vashington, in the District of Columbia, have invented certain new and useful Improvements in Marking-Brushes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention is an in'iprovement in that class of fountain marking-brushes having an elastic compressible receptacle or holder for the marking-liquid and a tube or nozzle carrying the brush proper and detachably connected with a nipple secured to the aforesaid receptacle. I employ a supplementary nippie, which is detachably applied to the nip-' ple proper and provided with a tapered shank to adapt it for the required connection with the tube to which the brush proper is secured. The coincident passages in the nipple and brush-tube are of different diameters.

In the drawing I show a central longitudinal section of my improved brush.

The letter A indicates a hollow elastic compressible receptacle or holder for the liquid or paint employed for marking. A metal piece B, which I term the nipple proper, is secured to this receptacle. It has a central longitudinal bore Ct for passage of the marking-liquid and a circumferential groove 1) to receive the edge of the holder A, that surrounds the opening through which the enlarged end of the nipple B is forcibly inserted.

The reduced outer extremity c of said nipple is screwthreaded to provide for attachment of a removable supplementary nipple C,which has a threaded socket adapted to screw on the part c of nipple B. This supplementary nipple has a tapered shank or tip (I and a smaller bore 0 than that a of the nipple proper B. The brush proper I) is secured in a tapered tube E and provided with a central passage f for discharge of the marking-liquid. A block 9 is fitted tightly in the lower enlarged end of the tube E and provided with a central tapering perforation adapted to receive the correspondingly-tapered shank or tip cl of the detachable or supplementary nipple G, as shown.

By the above-described construction and conu ection of parts I provide a marking-brush well adapted for use with either very thin or thick marking liquid or paint.

\Vhen it is desired to fill the receptacle or holder A with thin liquid, the brushholding tube E is slipped off the tip (I of the supplementary nozzle C, and the said tip being inserted in the liquid the holder A is compressed and upon expanding it becomes filled. The brush-tube E being then replaced it is held by friction, and escape of the liquid is prc vented by atmospheric pressure and the smallness of the passage in part 0 and the brush proper save when the elastic holderA is forcibly compressed; but if the liquid to be used is thick it will not pass so readily as desirable through the passages in parts 0 and D, and hence it is necessary to unscrew the supplementary nipple and its attached brushtube E in order to enable the holder A to be quickly filled by suction through the larger passage a in the nipple proper. The supplementary nipple C being then replaced the marking-brush is again ready for use, and the thick liquid may be readily expelled by applying the grcatcr required pressure to the elastic holder.

My brush is thus specially adapted for convenient and expeditious use with liquids of Widely-different consistencies.

What I claim is- In a fountain marking-brush,the combination, with the compressible holder and the nipple proper B, having the enlarged central passage, the threaded tip 0, and a circumferential groove Z) to adapt it for attachment to said holder, of the detachable supplementary nipple 0, having an internally-threaded socket, a tapered shank d, and a central passage e, which is smaller than that in the nipple proper, and the detachable DlllSll-llOldGl'E, having the perforated block g in its larger end and carrying the brush proper D, having a lengthwise passage corresponding to that in the supplementary nipple, all as shown and described.

In testimony whereof I aflix my signature in presence of two witnesses.

ARMISTEAD M. DARRELL. Witnesses:

Tnos. S. HOPKINS, S. G. HOPKINS. 

